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ASTM D4255 Rail Shear Test In-Plane of Polymer Matrix Composite Materials

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ASTM D4255 Standard Test Method for In-Plane Shear Properties of Polymer Matrix Composite Materials by the Rail Shear Method


ASTM D4255 is a test method for testing the in-plane shear properties of high-modulus fiber-reinforced composite materials. The method is divided into two procedures. Procedure A tests laminates clamped between two pairs of loading rails. When loaded in tension the rails introduce shear forces in the specimen. In Procedure B, laminates clamped on opposite edges with a tensile or compressive force applied to a third pair of rails in the center are tested. 


Properties that may be measured by this test method include:

 In-plane shear stress versus engineering shear strain response,

 In-plane shear chord modulus of elasticity,

 Offset shear stress, and Maximum in-plane shear stress. 

ASTM D4255 Rail Shear Test In-Plane of Polymer Matrix Composite Materials

In cases in which the engineering shear strain at failure is greater than 5 %, the shear stress corresponding to 5 % engineering shear strain should be reported.


ASTM D4255 Rail Shear Test In-Plane of Polymer Matrix Composite Materials


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